Author Contributions: Drs Stoffels and Klode had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Boy, Klode.
Acquisition of data: Stoffels, Boy, Pöppel, Kuhn, Klötgen, Klode.
Analysis and interpretation of data: Stoffels, Boy, Dissemond, Schadendorf, Klode.
Drafting of the manuscript: Stoffels, Pöppel, Kuhn, Klötgen, Dissemond, Klode.
Critical revision of the manuscript for important intellectual content: Stoffels, Boy, Schadendorf, Klode.
Statistical analysis: Stoffels, Boy, Klode.
Administrative, technical, or material support: Stoffels, Boy, Pöppel.
Study supervision: Stoffels, Boy, Schadendorf, Klode.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Schadendorf reported receiving consultancy fees, having board membership, and receiving lecture fees from GlaxoSmithKline, Novartis, Amgen, Bristol-Myers Squibb, Roche, Genentech, and MSD. No other authors reported any disclosures.
Funding/Support: This study was not supported by any grant or sponsor.